DIY Network

Colorful Flowers

Learn about several plant varieties and the planting information for each zone.

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Blue Bees Delphinium (12 of 12)

Plant in full sun to light shade
Plant in average to moist soil; divide in early spring every 3-4 years
Plants may need staking in wind or heavy rain
Poisonous
Height: 36-48 inches; Width: 18-24 inches
Hardy in USDA zones 3-9:
Gardener's Note: Although many resources say hardy in zones 3-9, it sometimes struggles in zones colder than zone 7 in the South and 8 in the Pacific Northwest.
Zone 3: Plant in spring to prevent winter heaving; plant in full sun; apply extra mulch after first hard frost; avoid contact with salt.
Zone 4: Plant in spring to prevent winter heaving; plant in full sun; apply extra mulch after first hard frost; avoid contact with salt.
Zone 5: Plant in spring to prevent winter heaving; plant in full sun to light shade; apply extra mulch after first hard frost; avoid contact with salt.
Zone 6: Plant in spring; plant in full sun to light shade.
Zone 7: Plant in early spring; plant in full sun to light shade; provide supplemental water during dry spells; plants may languish in hot, humid areas.
Zone 8: Plant in early spring; plant in full sun to light shade; provide supplemental water during dry spells; plants may languish in hot, humid areas.
Zone 9: Plant in early spring; plant in full sun to light shade; provide supplemental water during dry spells; plants may languish in hot, humid areas.

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